I just installed PercX on two machines, both Windows 10, both with Focusrite interfaces. The stand-alone application is working well on a Dell XPS laptop. The desktop Dell XPS with a Focusrite 6i6 gen 2 is giving an "Audio Driver Initialization Error" and is pretty much dead in the water after that. I reconnected an old Tascam 16x8 and had the same problem.
The PercX VST2 inside my DAW is working fine on both machines. Note that Hexeract stand-alone is working fine on both computers.